// Copyright (c) 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/web_contents/web_contents_view_child_frame.h"

#include "build/build_config.h"
#include "content/browser/frame_host/render_widget_host_view_child_frame.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/public/browser/web_contents_view_delegate.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/size.h"

using blink::WebDragOperation;
using blink::WebDragOperationsMask;

namespace content {

WebContentsViewChildFrame::WebContentsViewChildFrame(
    WebContentsImpl* web_contents,
    WebContentsViewDelegate* delegate,
    RenderViewHostDelegateView** delegate_view)
    : web_contents_(web_contents)
    , delegate_(delegate)
{
    *delegate_view = this;
}

WebContentsViewChildFrame::~WebContentsViewChildFrame() { }

WebContentsView* WebContentsViewChildFrame::GetOuterView()
{
    return web_contents_->GetOuterWebContents()->GetView();
}

const WebContentsView* WebContentsViewChildFrame::GetOuterView() const
{
    return web_contents_->GetOuterWebContents()->GetView();
}

RenderViewHostDelegateView* WebContentsViewChildFrame::GetOuterDelegateView()
{
    RenderViewHostImpl* outer_rvh = static_cast<RenderViewHostImpl*>(
        web_contents_->GetOuterWebContents()->GetRenderViewHost());
    CHECK(outer_rvh);
    return outer_rvh->GetDelegate()->GetDelegateView();
}

gfx::NativeView WebContentsViewChildFrame::GetNativeView() const
{
    return GetOuterView()->GetNativeView();
}

gfx::NativeView WebContentsViewChildFrame::GetContentNativeView() const
{
    return GetOuterView()->GetContentNativeView();
}

gfx::NativeWindow WebContentsViewChildFrame::GetTopLevelNativeWindow() const
{
    return GetOuterView()->GetTopLevelNativeWindow();
}

void WebContentsViewChildFrame::GetScreenInfo(ScreenInfo* screen_info) const
{
    // TODO(wjmaclean): falling back to the default screen info is not what used
    // to happen in RenderWidgetHostViewChildFrame, but it seems like the right
    // thing to do. We should keep an eye on this in case the else-clause below
    // causes problems.
    if (web_contents_->GetOuterWebContents())
        GetOuterView()->GetScreenInfo(screen_info);
    else
        WebContentsView::GetDefaultScreenInfo(screen_info);
}

void WebContentsViewChildFrame::GetContainerBounds(gfx::Rect* out) const
{
    RenderWidgetHostView* view = web_contents_->GetRenderWidgetHostView();
    if (view)
        *out = view->GetViewBounds();
    else
        *out = gfx::Rect();
}

void WebContentsViewChildFrame::SizeContents(const gfx::Size& size)
{
    // The RenderWidgetHostViewChildFrame is responsible for sizing the contents.
}

void WebContentsViewChildFrame::SetInitialFocus()
{
    NOTREACHED();
}

gfx::Rect WebContentsViewChildFrame::GetViewBounds() const
{
    NOTREACHED();
    return gfx::Rect();
}

void WebContentsViewChildFrame::CreateView(const gfx::Size& initial_size,
    gfx::NativeView context)
{
    // The WebContentsViewChildFrame does not have a native view.
}

RenderWidgetHostViewBase* WebContentsViewChildFrame::CreateViewForWidget(
    RenderWidgetHost* render_widget_host,
    bool is_guest_view_hack)
{
    return RenderWidgetHostViewChildFrame::Create(render_widget_host);
}

RenderWidgetHostViewBase* WebContentsViewChildFrame::CreateViewForPopupWidget(
    RenderWidgetHost* render_widget_host)
{
    return GetOuterView()->CreateViewForPopupWidget(render_widget_host);
}

void WebContentsViewChildFrame::SetPageTitle(const base::string16& title)
{
    // The title is ignored for the WebContentsViewChildFrame.
}

void WebContentsViewChildFrame::RenderViewCreated(RenderViewHost* host) { }

void WebContentsViewChildFrame::RenderViewSwappedIn(RenderViewHost* host) { }

void WebContentsViewChildFrame::SetOverscrollControllerEnabled(bool enabled)
{
    // This is managed by the outer view.
}

#if defined(OS_MACOSX)
bool WebContentsViewChildFrame::IsEventTracking() const
{
    return false;
}

void WebContentsViewChildFrame::CloseTabAfterEventTracking()
{
    NOTREACHED();
}

void WebContentsViewChildFrame::SetAllowOtherViews(bool allow)
{
    NOTREACHED();
}

bool WebContentsViewChildFrame::GetAllowOtherViews() const
{
    NOTREACHED();
    return false;
}
#endif

void WebContentsViewChildFrame::RestoreFocus()
{
    NOTREACHED();
}

void WebContentsViewChildFrame::Focus()
{
    NOTREACHED();
}

void WebContentsViewChildFrame::StoreFocus()
{
    NOTREACHED();
}

DropData* WebContentsViewChildFrame::GetDropData() const
{
    NOTREACHED();
    return nullptr;
}

void WebContentsViewChildFrame::UpdateDragCursor(WebDragOperation operation)
{
    if (auto view = GetOuterDelegateView())
        view->UpdateDragCursor(operation);
}

void WebContentsViewChildFrame::GotFocus()
{
    NOTREACHED();
}

void WebContentsViewChildFrame::TakeFocus(bool reverse)
{
    // TODO(avallee): http://crbug.com/610819 Advance focus to next element in
    // outer WebContents.
}

void WebContentsViewChildFrame::ShowContextMenu(
    RenderFrameHost* render_frame_host,
    const ContextMenuParams& params)
{
    NOTREACHED();
}

void WebContentsViewChildFrame::StartDragging(
    const DropData& drop_data,
    WebDragOperationsMask ops,
    const gfx::ImageSkia& image,
    const gfx::Vector2d& image_offset,
    const DragEventSourceInfo& event_info,
    RenderWidgetHostImpl* source_rwh)
{
    if (auto view = GetOuterDelegateView()) {
        view->StartDragging(
            drop_data, ops, image, image_offset, event_info, source_rwh);
    } else {
        web_contents_->GetOuterWebContents()->SystemDragEnded(source_rwh);
    }
}

} // namespace content
